For Saint-Briac-sur-Mer :
No gale warning.
For the night from Thursday to Friday NNW force 3 in the early part of the night becoming NW force 2. Gusts reaching 13 knots in the early part of the night.
Slight sea. Low from N. Excellent visibility becoming good in the middle of the night then good. Daytime of Friday 21 august : The sky will remain changeable.
Good clear periods alternating with cloudy spells, sometimes dense. Risk of showers in the morning, showers late in the day. In the evening, cloudy spells, sometimes dense.
Light showers. NW wind force 3 continuing all day. Gusts reaching 16 knots in the evening. Slight sea. Low from N. Good visibility becoming excellent in the middle of the day.